 The primary qualification for being accredited as an ASD was a pass in an on-line multiple choice examination that adhered to the Principles of Symbian OS curriculum.This curriculum was reviewed on an annual basis to ensure that the accreditation kept up to date with developments in the Symbian operating system.The final release of the curriculum was made in 2009 although it still adhered closely to the ASD Primer, a learning aid published by Wiley under the Symbian Press imprint.